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Question Number 128010 by Study last updated on 03/Jan/21

Commented by Study last updated on 03/Jan/21

$$helpmeandshowpractice$$

Commented by som(math1967) last updated on 03/Jan/21

$$\frac{1}{x}$$

Commented by som(math1967) last updated on 03/Jan/21

$$\frac{1}{x}\{\frac{x}{cosocos1}+\frac{x}{cos1cos2}+...+\frac{x}{cos44cos45}\}$$$$=\frac{1}{x}\{\frac{sin(1-0)}{cos0cos1}+\frac{sin(2-1)}{cos1cos2}+..\frac{sin(45-44)}{cos44cos45}\}$$$$=\frac{1}{x}\{\frac{sin1}{cos1}-\frac{sin0}{cos0}+\frac{sin2}{cos2}-\frac{sin1}{cos1}$$$$......+\frac{sin45}{cos45}-\frac{sin44}{cos44}\}$$$$\frac{1}{x}\times 1=\frac{1}{x}$$

Commented by Study last updated on 03/Jan/21

$$good!!thankssir$$

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